Agnibheda–Vaṃśa: Forms of Agni, Their Functions, and Progeny (अग्निभेद-वंशः)
ब्रह्मज्योतिर्वसुर्धामा ब्रह्मस्थाने स उच्यते / अचौकपादुपस्थो यः स वै शालासुखीयकः
brahmajyotirvasurdhāmā brahmasthāne sa ucyate / acaukapādupastho yaḥ sa vai śālāsukhīyakaḥ
In the Brahmasthāna he is spoken of as ‘Brahmajyoti’ and ‘Vasurdhāmā’. He who is stationed near the feet of the square (mandala) is indeed called ‘Śālāsukhīyaka’.